Background exploitation KEV catalog No authentication

CVE-2024-23222

Apple Multiple Products WebKit Type Confusion Vulnerability

CheckOps priority index

6.2/10 Patch within 7 days

Severity8.8

Probability1.1

Exploitation4/5

Severity = CVSS. Probability = EPSS (FIRST). Exploitation = public signals: KEV, EUVD, ransomware, EPSS above 10 %, no account required.

EPSS · today 10.6% higher than 95.8% of CVEs

CVSS 3.1 8.8 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:

Exploited for 1,015 days 23 Jan 2024

CISA due date 13 Feb 2024 for US federal agencies

Exploitation probability EPSS · FIRST

EPSS probability (%)Percentile among all CVEs

Exploitation signals 4 / 5

KEV catalog (CISA)23 Jan 2024
Exploited in EUVD (ENISA)23 Jan 2024
Used by ransomwareno
EPSS above 10 %10.6%
No account, over the networkyes

What to do

Fix

Apply the vendor’s fix as soon as it is available.

CISA guidance: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Meanwhile

Take the service off the internet or restrict access to it, watch the logs and look for signs of compromise.

Manufacturers (CRA)

Exploited vulnerability in your product: early warning to ENISA within 24 h, then notification within 72 h (Article 14 of the Cyber Resilience Act). The CRA explained

Description ENISA EUVD

A type confusion issue was addressed with improved checks. This issue is fixed in Safari 17.3, iOS 15.8.7 and iPadOS 15.8.7, iOS 16.7.5 and iPadOS 16.7.5, iOS 17.3 and iPadOS 17.3, macOS Monterey 12.7.3, macOS Sonoma 14.3, macOS Ventura 13.6.4, tvOS 17.3, visionOS 1.0.2. Processing maliciously crafted web content may lead to arbitrary code execution. This fix associated with the Coruna exploit was shipped in iOS 17.3 on January 22, 2024. This update brings that fix to devices that cannot update to the latest iOS version.

Affected products

iOS and iPadOSmacOSvisionOStvOSSafariMultiple Products

Affected versions

0 <15.8.7
0 <12.7.3
0 <14.3
0 <16.7.5
0 <17.3
0 <13.6.4
0 <1.0.2

Weaknesses (CWE)

CWE-843

Open source packages OSV

Affected libraries according to OSV, with fixed versions.

Timeline

23 Jan 2024
Published
23 Jan 2024
Exploitation reported (ENISA)
23 Jan 2024
Added to the KEV catalog
13 Feb 2024
CISA remediation due date
26 Sept 2026
EPSS peak: 10.6%

References

Other exploited vulnerabilities from the same vendor

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CVE-2026-65400Apple macOS Improper Authentication Vulnerability
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CVE-2025-43520Apple Multiple Products Classic Buffer Overflow Vulnerability
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CVE-2025-43510Apple Multiple Products Improper Locking Vulnerability
4.3 · Background exploitation
CVE-2025-31277Apple Multiple Products Buffer Overflow Vulnerability
5.4 · Background exploitation
CVE-2023-43000Apple Multiple products Use-After-Free Vulnerability
5.4 · Background exploitation